Nut lock device



June 25, 1935. J. YOUNG-I27... .v 25 2 NUT LOCK DEVICE Filed Sept 18,19:55?

bolts 6 and brake adjustingnuts I provide an Patented June 25, 1935-UNITED STATES PATENT OFFICE mesne assignments, to

The National Superior Company, Toledo, Ohio a corporation of DelawareApplication September 18, 1933, Serial No. 689,941

6 Claims.

This invention relates to an improved adjusting nut lock device thatfinds particular application in connection with the adjusting mechanismof a brake structure.

An object of this invention is to provide an improved and effectivedevice that will operate to prevent theaccidental rotation of the brakeadjusting nut used on a brake structure and to also provide in the sameinstrumentality a wrench which can be utilized in making the desiredbrake adjustment. This invention is addressed to an improvement over thestructure shown in the Faulkner et al. Patent No. 1,925,314 grantedSeptember 5th, 1933.

In carrying out this invention, I employ a wrench member that isnormallyretained in engagement with the adjusting nut of a brakemechanism and secured against any rotary movement relative to theadjusting screw. The wrench member can be disengaged from its lockedposition and employed as a regular wrenchv for adjusting the brakemechanism after which operation the-wrench is returned to its lockingposition to retain the adjusting nut from rotation.

Figure 1 is a partial front elevation of a hoist- 1 ing drum and brakeassembly embodying my invention.

Figure 2 is an enlarged fragmentary plan view. Figure 3 is an enlargedfragmentary view in elevation.

Figure 4 is a perspective view of the vice.

Figure 5 shows a modification of my invention. Referring to the drawing,I indicates the spooling drum of a hoisting drum having brake rims -2mounted on its opposed flanges. The brake mechanism issimilar to thatshown in the joint application Serial No. 519,508, filed on March 2,1931, by S. W, Long and applicant, which issued lock deon April 24,1934, as Patent No. 1,956,433, and

includes a pair of brake bands 3 mounted on the rims 2, an actuatinglever 4 connected through a leverage mechanism to the live ends of thebands 3 and an equalizer beam 5 for anchoring the dead ends of the bands3. Eye

adjustable connection between the brake bands 3 and the equalizer beam5. The brake adjusting nut I is provided with a flanged portion to forma collar 9 which fits within a shouldered recess in the equalizer beam.

The locking device forholding the adjusting nut 1 against rotationincludes an open end type of wrench member 8 which has a forked openingI! to engage the non-circular portion of the nut I. The end of thewrench remote from the open end I 2 is provided with an elongated slot lwhich fits over a hooked lug H formed on the upper face of the equalizerbeam 5. The slot I0 is slightly longer than the corresponding length ofthe lug H so that it is necessary to slide the member 8 radially awayfrom the nut 1 in order to lift the same clear of the hooked lug andthereby render the member 8 free to be employed as a wrenchfor rotatingthe adjusting nut. Upon the adjustment being completed, the wrench isreturned to its locked position on the lug II to secure the adjustingnut against rotation from either accident or vibration. The slope formedon the upper face of the equalizer beam permits the wrench member 8 tohave a tendency to slide downwardly on the equalizer beam surface and toengage the hooked portion of the lug ll.

Figure shows a modification of the invention in which the wrench member8a is closedat the end which engages the adjusting nut To for thepurpose of preventing any removal of the member from the brakemechanism. The wrench member la is provided with an elongated opening|2a to permit sliding the member radially to disengage the hooked lug onthe equalizer bar. In the event that the wrench member 8a cannot take acomplete turn when adjusting the nut 1a, the wrenchcan be lifted fromengagement with the non-circular portion of the nut and then droppedover the nut in another position for effecting another partial turn ofthe nut.

While I have herein illustrated two preferred embodiments of myinvention, it is to be understood that I:do not wish tobe limited to theparticular structures shown in the drawing but that my invention is ofthe full scope of the appended claims, and is obviously subject tofurther varied modifications without departing from the spirit of myinvention. 1

I claim:

1. In a device of the character described, the combination of a drum, abrake rim non-rotatively mounted relative to said drum, .releasablefrictional brake means operatively associated with the brake rim toarrest the rotation thereof, an adjusting means for the brake meansincluding a rotatable member, detachable means having a handle extensionadapted in one position'to engage the rotatablev member to hold the samein adjusted position, and means to releasably hold said detachable meansin said position, said deimpart rotation to the rotatable member.

2. In adevice of thecharacter described, the

combination of a drum, a brake rim non-rotatively mounted relative tosaid drum, a brake band passed over the brake rim, a brake adjustingnut,

means to anchor said nut, means secured to the dead end of the brakeband and adjustably secured to the adjusting nut, detachable meanshaving a handle extension adapted in one position to engage theadjusting nut to hold the same in ad- I combination of a drum, a brakerim non-rotatively mounted relative to said drum, a releasablefrictional brake means operatively associated with 'the brake rim toarrest the rotation thereof, an

adjusting means for the brake means including a rotatable adjusting nut,a detachable forked member having a handle extension and adapted toengage a non-circular portion of said nut, said member in one positionbeing adapted to hold the nut in adjusted position, and means toreleasably hold said detachable forked member in said position, saidforked member upon being released from the first position being adaptedupon manual actuation applied to the handle extension to impart rotationto the nut to adjust the brake,

4. In a device of the character described,'the combination of a drum, abrake rim non-rota .tively mounted relative to said drum, a releasablefrictional brake means operatively associated with the brake rim toarrest the rotation thereof, an adjusting means .for the brake meansincluding a rotatable adjusting nut, a detachable forked member having ahandle extension and adapted to engage a non-circular portion of saidnut, supporting means for said member, a hook shaped lug on thesupporting means, and a slot in the forked member adapted to fit overthe hook shaped lug tachable means upon being released from the firstposition being adapted upon manual actuation to r to retain the memberin a fixed position, said forked member upon disengagement from the lugbeing adapted upon manual actuation applied to the handle extension toimpart rotation to the nut to adiust the brake.

5. In a device of the character described, the combination of a drum, abrake rim non-rotatively mounted relative to said drum, a releasablefrictional brake means operatively associated with the brake rim toarrest the rotation thereof, an adjusting means for the brake meansincluding a rotatable adjusting nut, a detachable forked member having ahandle extension and adapted to engage a non-circular portion of saidnut, supporting means having an inclined surface for said member, a hookshaped lug on the inclined supporting means, and a slot in the forkedmember adapted to fit over the hook shaped lug to retain the member in afixed position, said forked member upon disengagement from the lug beingadapted upon manual actuation applied to the handle extension to impartrotation to the nut to adjust the brake.

6. In a device of the character described, the combination of a rotatingelement, a brake rim non-rotatively mounted relative to said rotatingelement, a releasable frictional brake means operativeiy associated withthe brake rim to arrest the rotation thereof, an adjusting means for thebrake means including a rotatable adjusting nut, a wrench member havinga handle extension at one end and an enclosed elongated opening at theother end, the sides of the elongated opening defining the smallestdimension thereof being adapted to engage a non-circular portion of thenut, said wrench member being free to move transversely-of the nut tothe extent of the elongated opening therein, supporting means for thewrench tion upon lateral shifting and lifting of the handle extension.

FORREST J. YOUNG.

